Even smaller Update.
Nothing much done lately. 50+ hour work weeks leave me not wanting to do anything during the week and with the nice weather I've been spending too much time at the range on the weekends...
The S5 N/A rotor housings and the S4 TII intermediate plates have all be cleaned up and resurfaced. Many thanks to Jonathan at Goopy Performance and Chip at Chips Motorsports for the service. I don't have pictures of the rotor housings at this time but see the intermediate plates below (courtesy of Chips Motorsports):
You can see more photographs in his (To_Slow) thread. All sealing surfaces have been lapped and re-nitrided and all unneccesary cooling ports have been plugged. These look SO MUCH better than they did when I sent them out. If I can get them back in my hands before the weekend I may try to take a trip to Columbus to talk about some porting and fabrication work with Defined Autoworks.